NBS Source
Arbomast BR

Application

Suitable for use in sealing small bedding joints and concealed joints subject to small amounts of movement.

Description

One part butyl based sealant for general sealing, intended for general sealing of many joints in traditional forms of construction where minimal movement is expected.


Features and benefits:

  • Not recommended for use against bituminous materials, expansion joints, against natural stone or movements joints subject to high degrees of movement.
  • Anticipated service life in excess of 20 years.
  • Health and safety: Avoid prolonged contact with skin.

General information

Color

Grey

Other

Material

Butyl

Shape

Formless

Uniclass

Pr_30_31_76_09 Butyl rubber construction joint sealantsPrimary

CAWS

N10/460 Sealant

Product range

Mastic Sealants

Specification data - Butyl rubber construction joint sealants Enhanced data

Colour

Grey.

Teak.

Accessories

Arbo Cleaner No.17.

Xylene based; not suitable for use with plastics or delicate finishes.

Arbo Cleaner No.16.

Alcohol based.

Arbo primer 925.

Application temperature

+5 to +50°C.

Service temperature

-40 to +90°C.

Working time

Tack free time at 20°C and 65% relative humidity: 24 hours.

Forms a skin after approximately 14 days.

Chemical resistance

Good resistance to normal acidity and alkalinity associated with building materials.

UV resistance

Not suited to situations exposed to direct sunlight, it may craze if exposed to sunlight.

Anticipated service life

20 years+.

Compression strength

Butt joints (movement in tension and compression): 10–15%

ShearStrength

Lap joints (movement in shear): 20–25%.

Joint width

Width: depth ratio (within the above minimum and maximum restrictions).

  • 2:1 butt joints.
  • 1:1 lap or floor joints.


6 mm (minimum single application); 20 mm (maximum single application).

Joint depth:

  • Porous substrates: 10 mm (minimum); 10 mm (maximum).
  • Non-porous substrates: 6 mm (minimum); 10 mm (maximum).