🔫 Mastic Calc

Sealant coverage & tubes to order — for doorsets & joints.

Doorset size

Width

Height

Joint to seal

All 4 sides2 × (W + H)

3 sidesno threshold

Thin3 × 3 mm

Medium5 × 5 mm

Thick8 × 8 mm

Bead width

Bead depth

Tube volume

310 mlcartridge

400 mlfoil

600 mlsausage

Waste allowance

No. of doorsets

Cost per tube (£, optional)

–tubes

–

Perimeter per doorset–

+ Waste allowance–

× Doorsets–

Coverage per tube–

Tubes needed (exact)–

Coverage = tube volume ÷ (bead width × bead depth). Tubes always rounded up.