Questions & answers

Real questions about our materials and systems, answered by the Allbase team.

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90 questions
Prepregs

Getting wrinkles around corners when laying up prepreg

✓ Answered20
Carbon fibre

Best way to cut dry carbon fabric without it fraying?

✓ Answered52
Carbon fibre

How do I stop the weave distorting over compound curves?

✓ Answered27
Prepregs

Found an old roll of prepreg in the freezer

✓ Answered17
Testing & certification

Can accelerated weathering results actually justify a 25-year service-life claim?

✓ Answered33
Carbon fibre

Does dry carbon fibre fabric have a shelf life?

✓ Answered22
Sustainability

I always seem to mix too much resin and bin the leftovers, how do I cut the waste down?

✓ Answered26
Infusion & bagging

Can I still infuse a big warm mould if the resin looks like it will gel before the part fills?

✓ Answered44
Prepregs

Do I really need to vacuum bag prepreg?

✓ Answered24
Carbon fibre

How do I work out how many layers of carbon a part needs?

✓ Answered41
Cut-edge corrosion

Our valley gutter keeps rusting and leaking again a year after every repair, what are we doing wrong?

✓ Answered46
Fibrelast

How many expansion joints are needed for a GRP roof?

✓ Answered57
Prepregs

My prepreg isn't as tacky as it used to be

✓ Answered12
Resin flooring

Our forklifts keep polishing the floor slick, how do I pick the right anti-slip finish?

✓ Answered36
Fibrecoat

Can I use Fibrecoat without the glassfibre?

✓ Answered57
Carbon fibre

How do I drill carbon fibre without it splintering or delaminating?

✓ Answered38
Marine

Should I use polyester or epoxy for a repair below the waterline, or does it not matter?

✓ Answered38
Prepregs

Can prepreg be stored in a normal household freezer?

✓ Answered26
Core materials

Do I really need to seal end-grain balsa before hand-laminating or is that overkill?

✓ Answered22
Resins & adhesives

What should I use to bond an aluminium bracket to a GRP panel?

✓ Answered33
Prepregs

Why let prepreg warm up before opening the bag?

✓ Answered11
Carbon fibre

Is carbon fibre dust dangerous to sand, and what precautions do I need?

✓ Answered45
Testing & certification

What evidence will building control expect for a liquid-applied roof system?

✓ Answered37
Approved installer

Benefits of an approved installer

✓ Answered38
Prepregs

Tiny bubbles all through my finished part

✓ Answered18
Approved installer

Can anyone be an approved installer

✓ Answered109
Sustainability

Overlay the failing flat roof or strip and replace it, which is the lower-carbon call?

✓ Answered34
Prepregs

Prepreg part still soft after curing

✓ Answered9
Carbon fibre

When should I use unidirectional carbon instead of woven fabric?

✓ Answered34
Infusion & bagging

Why do I have dry patches near the vacuum line on a finished infusion?

✓ Answered40
Approved installer

Transferrable Guarantee

✓ Answered71
Cut-edge corrosion

Rust is creeping in from the edges and overlaps of my roof sheets but the middles are fine, is that a problem?

✓ Answered39
Prepregs

Can I use prepreg without an autoclave?

✓ Answered22
Resin flooring

Patches of my new resin floor are bubbling and sound hollow, what's going on?

✓ Answered44
Marine

My gelcoat has gone chalky and faded, is it worth recoating or am I better painting the hull?

✓ Answered29
GRP roofing

Low cost fibreglass roofing resins

✓ Answered88
Prepregs

Is prepreg ruined if left out of the freezer overnight?

✓ Answered14
Core materials

My foam core dimpled and crushed at the edges under full vacuum, what did I do wrong?

✓ Answered30
Carbon fibre

Why do I keep getting pinholes in the clear coat over carbon?

✓ Answered63
GRP roofing

Calculating the materials needed for a GRP roof?

✓ Answered130
Approved installer

Do we need a written health and safety policy?

✓ Answered17
Fibrecoat

Can Fibrecoat be used to repair Asbestos?

✓ Answered82
Resins & adhesives

Some patches of my epoxy are still tacky a day later, did I mix it wrong?

✓ Answered52
GRP roofing

Curing time for GRP roofing?

✓ Answered70
Testing & certification

How can I check my finished parts actually hit the datasheet figures?

✓ Answered31
Sustainability

I've got an old GRP boat to get rid of, is there anything better than just paying to scrap it?

✓ Answered30
Carbon fibre

Is a carbon-aramid hybrid worth it for an impact-prone part?

✓ Answered19
Infusion & bagging

How do I choose flow media and peel ply for a thin infused skin over foam?

✓ Answered28
GRP roofing

How long does a fibreglass roof last?

✓ Answered95
Cut-edge corrosion

The old paint on our metal roof is chalky and coming off on your hand, can I just coat straight over it?

✓ Answered33
Carbon fibre

Do I need to isolate carbon fibre from aluminium fittings?

✓ Answered71
Resin flooring

We're coating a chiller floor at around 4 degrees, will the resin actually cure down there?

✓ Answered27
Approved installer

Is special clothing needed?

✓ Answered20
Marine

How do I tell whether the fine cracks on my topsides are crazing or the start of osmosis?

✓ Answered47
Fibrecoat

Will Fibrecoat bond to GRP roofing trims

✓ Answered34
General

Lead roofing replacement

✓ Answered115
Core materials

For infusing a large flat deck, is grooved and scrimmed foam worth it over plain sheet?

✓ Answered26
Resins & adhesives

My resin casting got smoking hot and cracked, was it too thick?

✓ Answered37
Testing & certification

How do I pick the right reaction-to-fire class for composite roofing panels on this job?

✓ Answered39
Approved installer

What experience do i need?

✓ Answered33
Fibretrims

Flat flashing cut size

✓ Answered84
Sustainability

If I swap to a bio-based resin on my next layup, will it handle the same as what I use now?

✓ Answered41
Infusion & bagging

Is it worth infusing a one-off console or should I just hand lay it?

✓ Answered35
GRP roofing

Installation time for GRP?

✓ Answered85
Fibrelast

Will the sun discolour a GRP roof?

✓ Answered68
General

Using acetone to clean my hands

✓ Answered77
Cut-edge corrosion

The cladding on our unit is corroding in patches, do I overcoat it or rip it off and replace?

✓ Answered55
GRP roofing

Whats the difference between GRP and Fibreglass roofing?

✓ Answered19
Resin flooring

Should I lay straight over the old epoxy, or grind it all back to concrete?

✓ Answered31
Fibrecoat

Fibrecoat curing times

✓ Answered106
Marine

Can I just fill a below-waterline gouge with filler and antifoul over it before launch next week?

✓ Answered34
Fibretrims

What is the best way to cut Fibretrims?

✓ Answered32
Core materials

Why can I see the outline of the core squares through my gelcoat after a few weeks?

✓ Answered58
Fibrecoat

Does the PU Activator make the surface waterproof?

✓ Answered107
Resins & adhesives

My cured epoxy has a greasy film and the next coat won't stick, what happened?

✓ Answered44
GRP roofing

GRP Roofing Layers

✓ Answered48
Testing & certification

Do I actually need independent testing here, or can I trust the datasheet?

✓ Answered45
Sustainability

What do I actually do with the pile of GRP offcuts building up in my workshop?

✓ Answered38
Infusion & bagging

My bag keeps dropping vacuum overnight, where should I start looking?

✓ Answered57
Fibrecoat

How long does it take for Fibrecoat to become watertight?

✓ Answered60
Cut-edge corrosion

Why are rust streaks running down my metal cladding when the sheets themselves look intact?

✓ Answered42
Fibrecoat

What's the shelf life of Fibrecoat?

✓ Answered26
Resin flooring

My slab still reads high on the damp meter, can I just crack on with the resin?

✓ Answered49
Marine

Small blisters have appeared below the waterline on my 1990s hull, is this osmosis and what do I do?

✓ Answered63
Fibrelast

Can Fibrelast be applied over shed felt

✓ Answered36
Core materials

Should I use balsa or PVC foam for a powerboat cockpit sole that gets walked on all day?

✓ Answered41
Overcoat

How to accurately measure out the quantity

✓ Answered21
GRP roofing

Decking used on a GRP Roof?

✓ Answered71
GRP roofing

Can you walk on a fibreglass roof?

✓ Answered41
Resins & adhesives

Is it worth using epoxy over polyester for a mould tool, or is that overkill?

✓ Answered28

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