Same day courier dispatch*
Fast delivery up to 5 working days
Extensive range and stock holding

Lap Mastic, 5mm wide x 6mm thick, 9.6m per Roll

Item
FS1MASTL5X6
£5.62 £4.68
1188 In Stock

payment-logos
  • Buy 19.99 for £5.05 £4.21 each and save 10%

Technical Specifications

  • Product Type - Lap mastic roll
  • Size - 9.6m (L) x 5mm (W)
  • Thickness - 6mm
  • Colour - Grey
  • Weight - 0.4kg
  • Manufacturer Warranty - 20 years
  • 6mm x 5mm Roll of Butyl Rubber Lap Mastic Sealant 
  • For use with Metal roof sheeting and Profile 3 Fibre Cement Sheeting.
  • 9.6m per Roll
  • Designed to stop water from tracking between the gaps created by end and side laps which could otherwise form a leak or damp roof.
  • Does not set hard like other sealants so allows for expansion and contraction of the material to ensure the watertight seal.
  • A Grade, Long Lasting Material
  • Grey Colour


How to apply lap mastic to Insulated panels


  • Ideal for sealing side and end laps on steel and GRP sheets
  • Allows for expansion
  • Tape design makes installation easy 

What is lap mastic for?
Lap mastic is used on the side lap of sheets where they meet another sheet as well as End Laps on roof systems where more than one sheet down the slope is required.

Is it required?
Yes, without it the side lap and end lap are likely to attract moisture and leak.

How is it applied?
This comes as a roll similar to double sided tape, you stick the one side down and peel off the paper tape before putting the next sheet over the top.

How much do I need?
Work out how many Linear Meters you require (Sheet Length x Number of sheet joints) THEN divide by 6 to get the quantity of rolls you require.

How many lines of mastic do I need for end laps (more than one sheet down the slope joining)
You will require 2 x lines of mastic on each end lap joint.

How does this ‘Set’ when dried?
This product does not fully set and is self drying, this allows for expansion and contraction of the roof system during different temperatures.

Customer Questions
No Customer Questions
Did you find what you were looking for?
Write Your Own Review
You're reviewing:Lap Mastic, 5mm wide x 6mm thick, 9.6m per Roll
Your Rating
Frequently Bought Together

Find the right materials and support for your project

We can help! View our supportive help guides and videos.

Our supportive guides and help videos will help you achieve the best results. Our knowledgeable team can also offer helpful tips, and support to help you plan and purchase what you need!