Loctite Threadlockers 222, 243, 263, 270, 290

Stocked item: delivered in 1–2 working days in Ho Chi Minh City, Binh Duong and Dong Nai; free delivery for orders from VND 20,000,000; defective items exchanged within 7 days. Shipping & return policy

Product code: LT-2XX · Specification: Loctite threadlockers (222, 243, 263, 270, 290…)

Loctite Threadlockers

Also known as: “Loctite 243 threadlocker”, “Loctite 263 red”, “anti-loosening screw adhesive”, “Loctite 290 wicking grade” — what sets ours apart: Henkel products with label/CO per lot, a selection table by thread size – breakaway strength – temperature, and 3 pack sizes.
Delivery: stocked items are delivered in 24–48 hours, made-to-order items 3–7 working days.

Threadlockers (anaerobic) cure in the thread gap in the absence of oxygen: they prevent loosening caused by vibration and protect threads against corrosion. Choose by breakaway strength: low (removable by hand tools: M2–M6 adjusting screws, measuring instruments) → 222; medium (removable with tools: M6–M20, general machinery) → 242/243 (243 tolerates oil and surfaces that have not been cleaned); high/permanent (removal requires heating to 250 °C: M10–M36, permanent assemblies) → 262/263/270/271/272/277; wicking (applied after assembly, small threads M2–M12) → 290.

Grade	Colour	Strength	Thread size	Temperature	Features	Pack size
222	Purple	Low	≤ M6	150 °C	Adjusting screws, soft metals	10 / 50 / 250 ml
242	Blue	Medium	M6–M20	150 °C	General purpose	50 / 250
243	Blue	Medium	M6–M20	180 °C	Oil-tolerant, replaces 242	10 / 50 / 250
262	Red	High	M10–M36	150 °C	Permanent, vibration-resistant	50 / 250
263	Red	High	≤ M25	180 °C	Permanent, oil-tolerant	10 / 50 / 250
270	Green	High	M6–M20	180 °C	Permanent, low viscosity	50 / 250
271	Red	High	≤ M20	150 °C	Permanent	50 / 250
272	Red	High	≤ M36	230 °C	High temperature resistance	50 / 250
277	Red	High	M20–M36	150 °C	Large threads, high viscosity	50 / 250
290	Green	Medium	M2–M12	150 °C	Wicks in after assembly	50 / 250

Henkel, CO per lot (Ireland/China), 2-year shelf life; MOQ 1 bottle.

Quick selection: not sure → 243 (90 % of cases); permanent assemblies → 263; already assembled screws that have loosened → 290; temperature >180 °C → 272.

FAQ
– How does 243 differ from 242? — 243 is the newer generation: oil-tolerant, works on surfaces that have not been cleaned, 180 °C; almost the same price.
– How long does it take to cure? — Handling strength in 10–25 minutes, full cure within 24 h; on passive metals (stainless steel, plated surfaces) use primer 7649 as well.
– How do I remove 263? — Heat to 250 °C or use a high-torque tool.

How do threadlockers work?

Loctite threadlockers are single-component acrylic adhesives based on dimethacrylate ester that cure by an anaerobic mechanism: the adhesive stays liquid in the bottle in contact with air, and only cures into a thermoset plastic when confined in the thread gap — where there is no oxygen and metal ions act as a catalyst. Excess adhesive outside the threads therefore does not cure and is easily wiped off.

“Active” metals (fast cure, no activator needed): iron, steel, brass, copper, bronze.
“Passive” metals (slow cure, an activator such as SF 7649 or SF 7471 is recommended): stainless steel, zinc-plated steel, chrome plating, black oxide, anodised aluminium, titanium, zinc. Grades 243, 263 and 270 are primerless — they cure even on stainless steel, plated surfaces and threads with light oil contamination.
Temperature has a major effect: at 40 °C the adhesive cures much faster; at 5 °C, 263/270 reach only about 80 % of their strength after 72 hours. In cold workshops or with large threads and wide gaps, use an activator.

Why use a threadlocker instead of spring washers or nylon nuts?

According to Henkel, when a bolt is tightened only about 15 % of the thread surface has metal-to-metal contact; the rest is clearance. Under vibration, the bolt slips sideways within this clearance and self-loosens — spring washers and nylon nuts only slow this process (evaluated by the Junker transverse vibration test). A threadlocker fills 100 % of the clearance, eliminating the root cause of self-loosening, and also seals out moisture to prevent rust and thread seizure.

Technical data from Henkel documentation (TDS)

Breakaway torque measured to ISO 10964 on M10 steel bolts and nuts, after 24 hours at 22–23 °C.

Grade	Colour	Viscosity (mPa·s)	Breakaway / prevail torque (N·m)	Fixture time	Operating temperature
222	Purple	900–1,500 (thixotropic)	6 / 4	15–20 min	−55 … 150 °C
243	Blue	1,300–3,000 (thixotropic)	22 / 9	10 min	−55 … 180 °C
263	Red	500	33 / 33	10 min	−55 … 180 °C
270	Green	500	33 / 33	10 min	−55 … 180 °C
272	Red-orange	4,000–15,000	23 / 25	40 min	−55 … 230 °C
290	Green	20–55 (wicking)	10 / 29	20 min	−55 … 150 °C

All grades reach full strength after 24 hours. Grades 222, 243, 263, 270 and 290 fluoresce under UV light — so you can check on the line whether a bolt has been coated.

How to apply correctly

Clean the threads with Loctite cleaner and let them dry (243/263 tolerate light oil, but cleaning is still recommended).
Shake the bottle; do not let the nozzle touch metal (metal ions will make the adhesive cure in the nozzle).
Through holes: apply a few drops to the bolt in the area where it engages the nut.
Blind holes: apply to the bottom third of the internal thread or the bottom of the hole, so the adhesive is not pushed out by trapped air.
Loctite 290: apply after assembly, at the base of the screw; the low-viscosity adhesive wicks into the threads by itself — for assembled screws that have loosened, adjusting screws, and sealing porosity in welds and castings.

How to disassemble

222, 243: remove with standard hand tools.
263, 270, 272, 290: apply localised heat of about 250 °C and disassemble while hot.

Storage and precautions

Store unopened bottles in a dry place, ideally at 8–21 °C; below 8 °C or above 28 °C degrades quality. The expiry date is printed on the label.
Do not pour excess adhesive back into the bottle.
Do not use in pure oxygen systems; use with caution on thermoplastics (may cause stress cracking).
Counterfeits: Henkel Asia-Pacific uses hologram labels and QR codes for authentication; buy through distributors with CO/CQ. PRIMEAG supplies documents of origin with every delivery.

Technical references

Data from the LOCTITE 2025 catalogue

Grade	Viscosity (mPa·s)	Thread size	Breakaway / prevailing torque (N·m)	Fixture time	Operating temperature
222	900–1,500, thixotropic	≤ M6	6 / 4	20 min	−55 to 150 °C
243	1,300–3,000, thixotropic	M6–M20	26 / 5	13 min	−55 to 180 °C
263	400–600	≤ M25	33 / 33	20 min	−55 to 180 °C
272	4,000–15,000	≤ M36	≥ 18 / ≥ 18 (3/8″ bolt)	—	−55 to 230 °C
290	20–55	≤ M12	10 / 29	25 min	−55 to 150 °C

Torque measured on M10 steel bolts and nuts per ISO 10964 (272: 3/8″ bolt). Fixture time is when the adhesive reaches about 25 % of its final strength, enough to move to the next process step. Grades 242, 262, 270, 271, 277 are not in the 2025 catalogue; their data follows Henkel TDS.

LOCTITE product catalogue 2025 (Henkel, Japanese edition, 52 pages, code C56-2502S): data tables for threadlocking, thread sealing, retaining, flange sealing, activators, instant adhesives and anti-seize. The data on this page has been cross-checked against the 2025 catalogue. The Vietnamese 2008 edition is still useful for the application-based selection charts, but some of its figures are out of date.

Download LOCTITE catalogue 2025 (PDF, 4.7 MB) · Vietnamese 2008 edition: maintenance selection charts

Price: from 180,000 VND (excl. 8% VAT).

REQUEST A QUOTE: send the quantity and specifications you need — PRIMEAG quotes within 30 minutes.

Hotline/Zalo +84 906 108 292 · info@primeag.vn

Written by the PRIMEAG engineering team.

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Updated: 2026-10-21

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Loctite Threadlocker Adhesives